I have a Carbon Strada velomobile.

It's already wired with 4 speakers that connect directly to the shell, making the whole thing a really effective amp.

It currently uses https://www.amazon.com/Lepai-LP-2020TI-Instruments-TPA3118-Amplifier/dp/B071FJF4FF/ref=asc_df_B071FJF4FF/?tag=hyprod-20&linkCode=df0&hvadid=312154678244&hvpos=1o11&hvnetw=g&hvrand=1664135363722303421&hvpone=&hvptwo=&h vqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9029716&hvtargid=pla-569395004374&psc=1]this[/url] amplifier, which works ok, but the power supply is a bit finicky. It's a RC car battery basically that's spliced to the power supply cord. :/

What I'm looking for is a similar amp with a bluetooth receiver (the speakers are wired, so I want to plug them in to it) with a self contained battery. Any suggestions?